Updated July 03, 2015.

Definition: In road racing, the Masters Division is for runners who are over a certain age. Usually the age is 40, but it can vary from place to place. The Masters Track and Field Committee of USA Track and Field (USTAF) requires that masters athletes be "at least 40 years old on the first day of the meet." Many road races offer special awards for masters runners.

Also see: 8 Tips for Running in Your 50s and Beyond

How Do I Deal With Running Slower as I Get Older?